Device for evaluating foaming property of gas-soluble surfactant and application thereof

Patent metadata

Field	Value
Publication number	US-10006845-B2
Application number	US-201514917857-A
Country	US
Kind code	B2
Filing date	May 7, 2015
Priority date	May 19, 2014
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A device for evaluating the foaming property of a gas-soluble surfactant, which comprises a gas source part, an evaluating kettle, a liquid part, and an intermediate container part. The rotation of the evaluating kettle, the gas-soluble surfactant and the supercritical carbon dioxide can be sufficiently and evenly mixed with each other when the solubility of the gas-soluble surfactant in the supercritical carbon dioxide is measured.

First claim

What is claimed is:

1. A device for evaluating the foaming property of a gas-soluble surfactant, characterized in that the device comprises a gas source part, an evaluating kettle, a liquid part, and an intermediate container part;
the gas source part comprises a carbon dioxide gas source;
the evaluating kettle comprises a cylindrical kettle body, a first piston arranged inside the cylindrical kettle body, and a first set of valves and a second set of valves respectively arranged at two axial ends of the cylindrical kettle body, the first piston divides the cylindrical kettle body into a displacement chamber and a mixing chamber, wherein the displacement chamber is connected with a first constant-flux pump and a first liquid storage tank through the first set of valves, the mixing chamber is respectively connected with a gas pipeline and a liquid pipeline through the second set of valves, the gas pipeline is connected with the carbon dioxide gas source, and the liquid pipeline is respectively connected with the liquid part and the intermediate container part through a third set of valves; a first pressure sensor is arranged on the first set of valves; a third pressure sensor is arranged on the third set of valves;
the liquid part comprises the liquid pipeline and a fourth set of valves connected in sequence, the fourth set of valves comprises three paths, wherein the first path is connected with a micro pump filled with the gas-soluble surfactant, the second path is connected with a second liquid storage tank through a second constant-flux pump, and the third path is an emptying valve;
the intermediate container part comprises a cylindrical intermediate container and a second piston arranged inside the cylindrical intermediate container, the second piston divides the cylindrical intermediate container into an evaluating chamber and a pressure regulating chamber, the third set of valves is connected with the evaluating chamber, the pressure regulating chamber is in communication with a third liquid storage tank respectively through a fifth valve and a third constant-flux pump, and the pressure regulating chamber is further in communication with a fourth liquid storage tank through a sixth valve and a back-pressure valve;
an observation window is arranged on the surface of the cylindrical kettle body; and a heating jacket is mounted outside the evaluating kettle.

2. The device for evaluating the foaming property of the gas-soluble surfactant according to claim 1 , characterized in that the carbon dioxide gas source comprises a liquid carbon dioxide source, a plunger pump and a flowmeter, wherein the liquid carbon dioxide source is connected with the gas pipeline through the plunger pump and the flowmeter in sequence.

3. The device for evaluating the foaming property of the gas-soluble surfactant according to claim 2 , characterized in that the liquid carbon dioxide source comprises a carbon dioxide gas cylinder, a dryer and a refrigeration part which is connected in sequence, wherein the refrigeration part comprises a refrigerator, a coil pipe arranged in the refrigerator and a high pressure storage tank.

4. The device for evaluating the foaming property of the gas-soluble surfactant according to claim 1 , characterized in that a first base is installed at bottom of the evaluating kettle, and the first base drives the cylindrical kettle body to rotate along a horizontal axial direction; and all the pipelines respectively connected with the evaluating kettle are flexible pipelines.

5. A method for evaluating the foaming property of a gas-soluble surfactant by use of the device of claim 1 , comprising the following steps:
(I) measuring the solubility of various gas-soluble surfactants in supercritical CO 2 at different pressures or temperatures;
(1) determining the additional amount of carbon dioxide in the evaluating kettle by use of a flowmeter;
(2) injecting the gas-soluble surfactant into the evaluating kettle by use of the micro pump;
(4) closing the second set of valves, heating the evaluating kettle to a set analog bottom layer temperature, keeping the temperature constant, and recording the pressure in the evaluating kettle through the first pressure sensor when the temperature is stable;
(5) driving the evaluating kettle to rotate for 1-2 hours along the horizontal axial direction at a constant speed by use of the first base, and recording the pressure in the evaluating kettle;
(6) observing whether the system in the evaluating kettle is turbid through a visual window, adjusting the pressure of the evaluating kettle by use of the first constant-flux pump and the first set of valves to change turbidity of the system in the evaluating kettle or not, and recording the pressure and temperature when turbid solution in the evaluating kettle is changed from turbid into clear;
(7) by means of a ratio of mass of the gas-soluble surfactant pumped into the evaluating kettle to the mass of the carbon dioxide pumped into the evaluating kettle recorded in the entire test process, calculating according to a formula I to obtain the solubility of the gas-soluble surfactant in supercritical carbon dioxide under the pressure and temperature conditions recorded in the step (6):

the
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solubility
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of
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the
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gas
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-

soluble
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surfactant
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in
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the

supercritical
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carbon
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dioxide

Assignees

• Univ China Petroleum

Inventors

• Li Zhaomin
• Zhang Chao
• Li Binfei
• Li Songyan
• Liu Jiquan
• Dong Quanwei

Classifications

• C09K8/94

  Foams · CPC title

• G01N13/00 Primary

  Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects (scanning-probe techniques or apparatus G01Q) · CPC title

• G01F13/00

  Apparatus for measuring by volume and delivering fluids or fluent solid materials, not provided for in the preceding groups · CPC title

• C09K8/92 Primary

  characterised by their form or by the form of their components, e.g. encapsulated material (C09K8/70 takes precedence) · CPC title